Which of the following types of molecule is the most abundant in an interstellar molecular cloud?
A) H2
B) CO
C) H2O
D) NH3
A) H2
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The dominant force at divergent boundaries is
A) compression. B) tension. C) shearing. D) similar to that in reverse faulting.
The graph in the figure shows the position of an object as a function of time. The letters H-L represent particular moments of time. At which moments shown (H, I, etc.) is the speed of the object (a) the greatest? (b) the smallest?
What will be an ideal response?
After a stone that is thrown straight up reaches the top of its path and then falls downward, its acceleration is
A) greater than at the top of its path. B) less than at the top of its path. C) the same as at the top of its path.
The coefficient of linear expansion of ordinary glass is three times that of Pyrex glass. An ordinary glass rod and a Pyrex glass rod of equal lengths at room temperature are dropped into boiling water. The change in length of the ordinary glass rod will be ___________ the change in length of the Pyrex glass rod
a. 1/9 b. 1/3 c. equal to d. 3 times e. 9 times